# CalPiV1.py

pi = 0
N = 100
for k in range(N):
    pi += 1 / pow(16, k) * ( \
        4 / (8 * k + 1) - 2 / (8 * k + 4) - \
        1 / (8 * k + 5) - 1 / (8 * k + 6))
print('圆周率值是：{}'.format(pi))
